Valve-gear.



R', BORCHERDT. l

`VALVE GEAR..

APPLICATION FILED OCT. l. 1914.

y Patented 2, i915.

. mamie.'

i To y'all whom 'it may concern: l

. I Y y REINHOLDT IBORGH'ER-DT, 0F SDTH EAUX-AUNA, WIISCONIVNZ n 'VALVE-GEAR.

Be it known that I,RE1Nno-I.D'r Benen# ERDT, a citizen 'of the United States, resid'- ing'- at South Kaukauna, Outagamie'county,

Wisconsin, have invented certainnew and useful Improvements in Valve-Gears, of

i which the following is a specification.

rllhis inventionrelates.- to improvements in valve gears, particularly adapted forI use .in locomotive engines, .and one ofthe ob-'l jects of the invention is to simplify the con! structionl of valve gears, and at the saine time Idispense with the use-ofe'ccentrics,

cams, et cetera. l e o.

A further object is lto provide *an improved. device of this character wherein the I .valve may be adjusted or. set to' `work within predetermined limits Vto control the lap' and lead of the valve, andI which may be readily andquickly ladJusted to increa'sethe lap and lead of the valve, beyond vsuch limits, or decrease the same at the willof the operator, and without necessitating the removing or detaching of any part of the mechanism, or they substitution of 'other parts therefor.` l

A further Aobject is tovl rovide 'an improved valve gear of'this ciaracter having means whereby the engine may be quickly re- -versed by the operation of'. a controlling lever, to shift the 'valve mechanism, and.` n'ieans4 ,wherebyv the valve may be 'readily' is pivotal-ly connected Aas at' 29 with the arm e tially the construction, combination and arrangement of the severalparts, hereinafter more lfully described and claimed and shown 'in the accompanying 'drawing illustrating the invention, land in 'whichlEigure 1 is a diagrammatic View in `elevation and partly in section of'an improved valve gearof this character constructed in accordance with the principles of this invention. Fig. 2 is a view similar to Fig'. .1,-

showing the parts' in 'a different position. Fig. -3 is' an enlarged'detail sectional view 'taken on line 3 3, Fig;'1.

Referring more particularly to thedrawing and in the present 'exemplication of this invention, the numeral 10 designates the engine cylinder, 11 the piston, 12 the piston rod, 13 the reninmcating `cros's'lead to .Spcincation'of Letters'Patent. A' Patint-,edf Apr. 27,' :|1915: limitation mea'o'ctober 1,1914, .se'ri'aiiiaasassa. i'

rrnin enanas rATENr-QFFICE which the piston 12 ,'ccnn'ected, v14 the guide for the cross head and lfthc'driving rod which is pivotally 'connected t'o the cross head, and all ofwhich, parts -lare of the .ordinaryand well known construction.

. The valve `16 1s ofthe reciprocating -type and-.reciprocates across the" ports or. paS-.4

24-is adjustably connected'with the slide 221 in an'ysuitable manner, butpreferably by passing through aV suitable 'aperture in 'the slide and 1s secured tothe Islide 'by .means of nuts 25, engaging' threaded portionsvof the rod .214 -on opposite sides ofthe slide,

the .val've With respect tothe slide.

lPlvotally connected to the cross head 13' is a bell crank lever 26, lone arm 27. of which 1s pivotally connected-with one end of a the elements 31, 32 is provided betweenl the slide 22 and the cross head 13, and the'free end of the element 31 is pivotally connected' of the element 32 of thejointed member is pivotally connected as at 134 with 'the arm ,35 of the bell crank lever 26. 'A member 36 27 of the bell crank lever andthey member 37 is connected as at- 33 with the member 36 and is also detachably connected.' to a lug 39 n carried by the -member v31, and-which lug, 39 1s preferably threaded 'tofreceivea nut for detachably securing the vmember 37 thereto. A second bell crank 40 is pivotally 4mounted as at 41 to a i'Xed support and the arm 42 thereof. is pivotally connected with the member 36, while the other arm `of the l thereby l enabling the proper positioningfof member 28 asat29, and theother end. of 'the' member is pivotally connected as at 30 with the rod 15. A jointedmember comprisin'gjo i as at 33 to the .slide 22, whilethe free end bell crank is connected by means of arod 43 with an operating lever 44 which coperates' 10Q l with a segment 45. "The bell 'crank 40 constitutes a fixed fulcrum for' the member 36, so that when the cross head `13, is reciprocated, the member 36 will rock aboutthe pivot 46 and this rocking movement of the 105 y member 36 will through theV mediumof theA member 37v rock the element 3l of the :pointed member about the fulcrum 33 and at the 'same time'theslide 2.2 will bereciprocated on 'the guide 2 3'to actuate the valvev 16..,

The member 28 is provided as a means for holdingthe member 36 and the arm 27 ofA the bell lcrank 26 in the proper position.

When'it is desired to cause the engine to advance, the lever 44-is moved to the position shown in Fig. 1 which will cause 'the l,parts to assume the positions shown in such figure, but when it is desiredto reverse the engine, the lever 44 is moved to the position shown in Fig. 2 which will shift the parts accordingly, and the shifting o f this lever 44 will position the valve 16 with respect to the ports 17', 18, 19 and 20 at the will of the operator. When the engine is shut down and it is desired to prevent steam from entering the cylinder, the lever 44' is shifted to a neutral position or to the position shown in dotted lines in Fig. 1 and in Which position, the valve 16 will be moved to the dotted line position to close the ports 19, 20. With this improved construction it Will be manifest that the lever 44 may be shifted lo position the valve 1'6 so that it Will move or reciprocate Within predetermined limits,

that is to say, to cause the valve 16 to have a certain lap and lead 'With respect to the ports,` but should it be desired to vary the lap or lead, this can be accomplished by iirst removing the stop pin 45a and then adjusting the lever 44 still farther forwardly or backvvardly With're peet to the quadrant 45, without arresting t e motion of the engine or any part thereof, and this variation 1n the lap or lead may be accomplished without removing any of the parts ofthe mech' anism and without substituting orl adding any parts thereto. If desired wear plates 47 48 may be provided between the slide 22 and the guide 23.

In order to hold the member 31 in proper position, the upper extremities thereof may be bifurcated, as shown in'detail in Fig. 3,

one arm of the bifurcation'being bent around the slide `22 and the extremities of the bifurcations being connected with the slide by means ofthe pivot pin 33.

With this improved construction it will also be manifest that all cams, eecentrics and `eccentric straps are dispensed with and the parts are so arranged that ready access may be had thereto from the outside of the engme.

By the provision of the member 37, which is detachably connected as at 39 With the member 31, the parts may be readily assembled and during sueh'assembling the parts may be properly adjusted and then the member 37 properly measured, after which the aperture for the lug 39 may be formed in the member, thereby insuring a proper alining and adjustment of the parts during the finitial 'assembling thereof. The parts are maintained in their adjusted positions by means of ordinary fastening provisions 49 of the quadrant 45 which coperate with the ordinary locking pawl, (the latter not being shown here).

While the preferred form, construction and arrangement of the several parts are' herein shown and described, it is to be understood that numerous changes may be made in thel details of construction and in the combination and arrangement of the several parts Without departing from the spirit of this invention.

What is claimed as new is z- 1. A valve gear of the character described, embodying a reciprocating valve, a reciprocating cross head, a slideconnected with the valve, a bell crank lever pivotally mounted directly upon the cross head, movable therewith and with respect thereto, a jointed member, one end of said member pivotally connected directly to the said slide, the other end of the member pivotally connected directly with one arm of the bell crank lever, the intermediate joint of said member being free, 'a second member pivotally connected by one end to the other arm of the bell crank lever, an operating lever connected with the said second member for actuating the latter to rock the bell crank, and a connection between the said second member, and that portion of the said ointed member which is connected with the said slide.

'2. A valve gear of the character described, embodying -a reciprocating, valve, a'reciprocating cross head, a slide connected with the valve, a bell crank lever pivotally'mounted directly upon the cross head, movable therewith and with respect thereto, a jointed member,`one end of said member pivotally connected directly to the said slide, the

other end of the member pivotally connected directly with one arm of the bell crank lever, the intermediate joint of said.

member being free, a second member pivotally connected by one end to the other arm of thebell crank lever, an operating lever connected with the said second member for actuating the latter to rock the bell crank', and a connecting member pivotally and detachably secured to the said` second member and that portion of the sain' jointed member which is connected with the .said slide.

3. A/valve gear of the character described, embodying areciprocating valve, a reciprocating cross head, a slide connected with the valve, a bell crank-lever pivotally mounted directly upon the cross head, movable therewith and with respect thereto, a jointed member, one end of the member pivotally connected directly with the said slide, the other end of the member pivotally connected directly with one arm of the bell crank lever, the intermediate joint of said member being free,

a second member pivotally connected by one end to the other arm of the bell crank lever, an operating lever connected With lthe said second member for actuating the insana latter to rock the bell crank, a connection be-v tween the said second member, and that porend directl with the said slide and at its other end irectly with one arm. ofthe bell crank, |the intermediate joint of said mem' ber being free, a second-member pivotally connected by one end to the otherarmv of the bell crank, a connection between the said Asecond member and that portion of the said jointed member which isconnected with the.

said slide, and means for actuating the said second member to position the valve for a predetermined reciprocating movement, the. said means also adapted to vary the extent' of the reciprocating movement of the valve while the degree of movement of the valve gear 'remains constant.

5. A valve gear of the character described, embodying 'a reciprocating valve, a reciprocating cross head,` a slide, an adjustable connection between the valve and slide, a bell crank lever pivotally connected directly with `the cross head and movable therewith, a jointed member pivotally connected at one end directly with the-said slide and at its other end directly with one arm of the bell crank, the intermediate joint of said member being free, a second member pivotally connected by one end to the other arm of the bell crank,.a connection between the said second member andv that portion of the said jointed member` which is connected with the said slide, means'foractuating the said sec# ond memberv to Iposition the valve for a predetermined reciprocating movement, the said means also adapted to varythe extent of the reciprocating movement of the valve while the degree of movement of the valve gear remains constant, and means for maintaining the parts in adjusted positions.

6. A valve gear of the character described, embodying a reciprocating valve, a reciprocating cross head, a slide, an adjustable connection between the valve and slide, a bell crank lever pivotally connected directly with the cross 'head and-movable therewith, Aa

jointed member pivotally connected at one end directly with the 'said slide -and at its other end directly with one arm of the bell crank, the'intermediate joint of said member bein free, a second member pivotally connecte i by one end to the other arm of the bell crank, a connection between the said second member and that portion ofthe said jointed member which is connected with the said slide, and means for. actuating the said second member to position the valve for a predetermined reciprocating movement, the said'means also adapted to vary the extent ofthe reciprocating movement of the valve while the degree of movement of the valve gear remains constant, the said means embodying a shiftable element constituting a fixed fulcrum for the said second member.

In testimony whereof l have signed my name to this specification, in the presence of .the subscribing witnesses, on this 8th day of September A. D. 1914.

' REINHOLDT BORCHERDT. Witnesses:

CEAS. BORCHERDT, l. F. MCMAHON, WM. d. Kowamm. 

